Steel Section Catalog
U 100x50x4.25
BR — Cold-formed Channel
Cold-formed channels (U shapes) are similar to C shapes but without stiffening lips. Used for light structural framing, supports, and secondary members.
Also known as: U 100x50x4.25 (UK / Australia)
The U 100x50x4.25 steel profile weighs 6.1 kg/m (4.13 lb/ft), has a depth of 100 mm (3.94 in), flange width 50 mm (1.97 in). Cross-sectional area: 795.8 mm². Moment of inertia Ix = 120.28 cm⁴, Iy = 17.25 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4.25 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 4.3 mm | 0.17 in |
| Weight | 6.1 kg/m | 4.13 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 795.8 mm² | 1.233 in² |
| Moment of inertia (Ix) | 120.28 cm⁴ | 2.89 in⁴ |
| Moment of inertia (Iy) | 17.25 cm⁴ | 0.41 in⁴ |
| Elastic section modulus (Sx) | 24.06 cm³ | 1.468 in³ |
| Elastic section modulus (Sy) | 4.44 cm³ | 0.271 in³ |
| Plastic section modulus (Zx) | 27.66 cm³ | 1.688 in³ |
| Plastic section modulus (Zy) | 5.33 cm³ | 0.325 in³ |
| Radius of gyration (rx) | 3.89 cm | 1.531 in |
| Radius of gyration (ry) | 1.47 cm | 0.579 in |
Beam Calculator— U 100x50x4.25
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 100x50x4.25
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
70.15 mm
L/86
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
